Physics Exam Past Questions and Answers | JAMB, WAEC and NECO

Physics is the science that studies the nature and properties of matter and energy. It covers topics like motion, heat, light, sound, electricity, magnetism, and the structure of atoms.

• Question 1821: In a purely inductive circuit, the current Options:
  A) lags behind the voltage in phase by 90^o
  B) leads the voltage in phase by 90^o
  C) is in the same phase with the voltage
  D) leads the voltage by 180^o
  Show Answer
  The correct answer is A .
• Question 1822: The electrochemical equivalent of silver is 0.0012gC^-1. If 36.0g of silver is to be deposited by electrolysis on a surface by passing a steady current for 5.0mins, the current must be Options:
  A) 6000A
  B) 100A
  C) 10A
  D) 1A
  Show Answer
  The correct answer is B .
• Question 1823:

  I. A liquid boils when its saturated vapor pressure is equal to the external pressure
  II. Dissolved substances in pure water lead to an increase in the boiling point.
  III. When the external pressure is increased, the boiling point increases.
  IV. Dissolved substances in pure water decreases the boiling point

  Which of the above combinations are peculiarities of the boiling point of a liquid?

  Options:
  A) I, II and III only
  B) I, II, III, and IV
  C) I, II, and IV
  D) II, III, and IV
  Show Answer
  The correct answer is A .
• Question 1824:

  A travelling wave of amplitude 0.80 m has a frequency of 16 Hz and a wave speed of 20 $ms-1$

  Calculate the wave number of the wave.

  Options:
  A) 3
  B) 4
  C) 5
  D) 2
  Show Answer
  The correct answer is C .
• Question 1825: Which of the following elements is the best absorber of X-rays? Options:
  A) hydrogen
  B) oxygen
  C) calcium
  D) copper
  E) lead
  Show Answer
  The correct answer is E .
• Question 1826: Which of the following may be used to explain a mirage? i. layers of air near the road surface have varying refractive indices in hot weather. ii. road surfaces sometimes become good reflectors in hot weathers. iii. light from the sky can be reflected upwards after coming close to the road surface. Options:
  A) ii only
  B) ii and iii only
  C) i and iii only
  D) i, ii, and iii only
  Show Answer
  The correct answer is C .
• Question 1827: To keep a vehicle moving at a constant speed v, requires power P, from the engine. The force provided by the engine is Options:
  A) $\frac{p}{v}$
  B) $\frac{1}{2}$ v
  C) pv
  D) $\frac{p}{v^2}$ v
  Show Answer
  The correct answer is A .
• Question 1828: The two liquids which are often used in thermometer on experiment basic is known as Options:
  A) Mercury only
  B) Alcohol and Water
  C) Mercury and Alcohol
  D) Alcohol only
  Show Answer
  The correct answer is C .
• Question 1829: A handbag containing some load weighing 162N is carried by two students each holding the handle of the bag next to him. If each handle is pulled ${60}^{\circ }$ to the vertical, find the force on each student's arm Options:
  A) 81N
  B) 121N
  C) 162N
  D) 324N
  Show Answer
  The correct answer is C .
• Question 1830: A man whose mass is 80kg climbs a staircase in 20s and expends power of 120W. Find the height of the staircase.[g = 10ms^-2] Options:
  A) 1.8m
  B) 2.0m
  C) 2.5m
  D) 3.0m
  Show Answer
  The correct answer is D .